4. (1.5 pts) You are wanting to improve your athletic performance. A friend from

Question

4. (1.5 pts) You are wanting to improve your athletic performance. A friend from the gym suggests that you take the supplement a-ketoglutarate. Theoretically, what effect would excess ??? have on cellular respiration? Choose any that apply a. It would inhibit the Citric Acid cycle. b. It would stimulate the Citric Acid cycle c. It would result in more ATP production d. It would reduce ATP production. e. It would have no effect. (1.5 pts) Based on the chemiosmotic coupling mechanism, which of the following predictions would be true of an actively respiring mitochondria in the presence of excess Choose any answers that apply 5. NADH and O2? a. The intermembrane space would be more acidic than the matrix. b. The intermembrane space would more basic than the matrix. c. The intermembrane space pH will be the same as the matrix. d. ATP synthesis would occur continuously e. ATP synthesis would be reduced or stop altogether f. NADH would NOT be oxidized continuously by the electron transport chain g. NADH would be continuously oxidized by the electron transport chain

Explanation / Answer

4. b and c, alpha ketoglutarate stimulate the citric acid cycle and if citric acid cycle stimulates it would give more ATP.

5. a, d, g the intermembrane space would be more acidic than the matrix due to presence po pumped protons leads to continuous synthesis of ATP by the continuous oxidation of NADH by ETC.

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